INSPIRIA™ (GA3284) is one of Sound Design Technologies' premiere DSP products designed on the VOYAGEUR™ platform. Combining the power and capabilities of Voyageur together with SOUNDDesign® Advanced Research, the GA3284 delivers cutting-edge features and high performance.
Voyageur is Sound Design Technologies' industry-leading programmable DSP (digital signal processing) platform. SOUNDDesign Advanced Research has developed a methodology that couples state-of-the-art acoustic algorithms to ensure high-fidelity digital sound quality for their high-end products.
The GA3284's Adaptive Noise Reduction preserves perceived speech levels without causing distortion. It monitors noise levels independently in 128 individual bands. This strategy also employs advanced psychoacoustic models to eliminate audible noise and reduce the amount of perceptible artifacts introduced by the noise reduction process.
Based on a phase cancellation method, the GA3284's adaptive feedback reduction algorithm provides increased maximum stable gain unlike other feedback cancellation strategies. Additionally, it features rapid adjustment for dynamic feedback situations and resistance to tonal inputs.
Sound Design Technologies' ADM (Adaptive Directional Microphone) algorithm is a two-microphone processing scheme. It is designed to automatically reduce the level of sound sources that originate from behind or the side of the hearing-aid wearer without affecting sounds from the front. The algorithm accomplishes this by adjusting the null in the microphone polar pattern to minimize the noise level at the output of the ADM.
In addition to these adaptive algorithms, the GA3284 also supports the following features:
FRONTWAVE® directional processing,
Cross fading between audio paths for click-free memory changes,
12-band graphic equalizer,
8 generic biquad filters (configurable as parametric or other filter types),
Programming speed enhancements,
Optional peak clipping,
Flexible compression adjustments,
Programmable tones for memory change and low battery indicators,
Wideband gain,
Volume control
Industry-leading security features to avoid cloning and software piracy.
Features
SOUNDDesign® Advanced Research
128-band Adaptive Noise Reduction
Adaptive Feedback Cancellation
Adaptive Directional Microphones
128-bit fingerprint security system and othersecurity features to protect against device cloning and software piracy
Soft acoustic fade between memory changes
FRONTWAVE® directional processing
High fidelity audio CODEC
20-bit audio precision
93dB input dynamic range with HRX™ Headroom Extension
1, 2 or 4 channel WDRC compression
12-band graphic EQ
8 biquadratic filters
Drives zero-bias 2-terminal receivers
4 analog inputs
4 fully configurable memories with audible memory change indicator
2 memory select pads
Internal or external volume control with programmable range
AGCo with variable threshold, time constants, and optional adaptive release
16kHz or 8kHz bandwidth
Optimized programming speed
thinSTAX® packaging
Also available as E1 (RoHS Compliant Hybrid)
thinSTAX® enabled:
0.215 x 0.124 x 0.067 in3
[5.46 x 3.15 x 1.70 mm3]
SOUNDDesign® Advanced Research
Adaptive Feedback Canceller 3.0
Adaptive Noise Reduction 3.0
Adaptive Feedback Canceller 3.0 features:
Phase cancellation using Adaptive FIR with LMS updates to maintain forward gain
Added stable gain up to 19 dB
Strengthened Immunity to tonal inputs
Enhanced entrainment management
Excellent performance in all acoustic environments
Advanced signal processing
4 channel WDRC with fine control of crossover frequency placement
12-band Graphic Equalizer designed for flexible frequency response shaping
Parametric filtering for frequency response smoothing
In-channel low level expansion
AGC-O output limiting
Minimum 20 bit end-to-end audio path
93dB input dynamic range with HRX™
4 versatile inputs
Advanced battery power management algorithms
Programmable Volume control range
Multiple sampling rates supported:
32 kHz: unparalleled high fidelity audio quality
16 kHz: lower current consumption
Improved hearing comfort:
4 fully configurable memories with audible memory change indicator
Cross fading between audio paths for click-free memory changes
Support for open fittings
Industry-leading security features. Protects intellectual property against device cloning and software piracy with:
128-bit fingerprint security to match each hybrid with client software
Enhanced ARK software security to match product libraries with client software
SDA communication:
Advanced communication strategy ensuring fast programming without compromising configuration versatility
Fast time-to-market:
Application Resource Kit (ARK) software, quickly configures the product for rapid product launches
ARKonline® support, including easy-to-use Wizard for streamlined product component library creation
Optional turn-key fitting software SOUNDFIT® with customization choices
Manufacturing Ease
Reflowable thinSTAX®
0.215 x 0.124 x 0.067 in3
5.46 x 3.15 x 1.70 mm3
E1 RoHS compliant environmentally friendly hybrid
Compact size enabling CIC applications
All pads located on the perimeter of the hybrid for easy inspection (no center pads)
